Exercise 2.2

1.

Which
of the following are truth functors? Where the expression is a truth-functor,
what is its truth-table? Where it is not a truth-functor what is
its partial truth-table? (A partial truth-table is a truth-table
in which some rows have a "?" in them; in these cases,
think of pairs of examples to show that sometimes the resulting
sentence will be true in these cases and sometimes the resulting
sentence will be false.)